/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.streaming.api.operators.python;

import org.apache.flink.annotation.Internal;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.functions.python.DataStreamPythonFunctionInfo;

/**
 * The {@link PythonMapOperator} is responsible for executing Python functions that gets one input
 * and produces zero/one or more outputs.
 *
 * @param <IN> The type of the input elements
 * @param <OUT> The type of the output elements
 */
@Internal
public class PythonMapOperator<IN, OUT> extends OneInputPythonFunctionOperator<IN, OUT, IN, OUT> {
    private static final long serialVersionUID = 1L;

    private static final String MAP_CODER_URN = "flink:coder:map:v1";

    public PythonMapOperator(
            Configuration config,
            TypeInformation<IN> inputTypeInfo,
            TypeInformation<OUT> outputTypeInfo,
            DataStreamPythonFunctionInfo pythonFunctionInfo) {
        super(config, inputTypeInfo, outputTypeInfo, pythonFunctionInfo);
    }

    @Override
    public String getCoderUrn() {
        return MAP_CODER_URN;
    }

    @Override
    public void emitResult(Tuple2<byte[], Integer> resultTuple) throws Exception {
        byte[] rawResult = resultTuple.f0;
        int length = resultTuple.f1;
        bais.setBuffer(rawResult, 0, length);
        collector.setAbsoluteTimestamp(bufferedTimestamp.poll());
        collector.collect(runnerOutputTypeSerializer.deserialize(baisWrapper));
    }
}
